src/mesa/main/transformfeedback.h

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 2010  VMware, Inc.  All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included
  14  * in all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  17  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  22  * OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25
  26 #ifndef TRANSFORM_FEEDBACK_H
  27 #define TRANSFORM_FEEDBACK_H
  28
  29 #include <stdbool.h>
  30 #include "bufferobj.h"
  31 #include "compiler.h"
  32 #include "glheader.h"
  33 #include "mtypes.h"
  34
  35 struct _glapi_table;
  36 struct dd_function_table;
  37 struct gl_context;
  38
  39 extern void
  40 _mesa_init_transform_feedback(struct gl_context *ctx);
  41
  42 extern void
  43 _mesa_free_transform_feedback(struct gl_context *ctx);
  44
  45 extern void
  46 _mesa_init_transform_feedback_functions(struct dd_function_table *driver);
  47
  48 extern unsigned
  49 _mesa_compute_max_transform_feedback_vertices( struct gl_context *ctx,
  50       const struct gl_transform_feedback_object *obj,
  51       const struct gl_transform_feedback_info *info);
  52
  53
  54 /*** GL_EXT_transform_feedback ***/
  55
  56 void GLAPIENTRY
  57 _mesa_BeginTransformFeedback_no_error(GLenum mode);
  58
  59 extern void GLAPIENTRY
  60 _mesa_BeginTransformFeedback(GLenum mode);
  61
  62 void GLAPIENTRY
  63 _mesa_EndTransformFeedback_no_error(void);
  64
  65 extern void GLAPIENTRY
  66 _mesa_EndTransformFeedback(void);
  67
  68 extern bool
  69 _mesa_validate_buffer_range_xfb(struct gl_context *ctx,
  70                                 struct gl_transform_feedback_object *obj,
  71                                 GLuint index, struct gl_buffer_object *bufObj,
  72                                 GLintptr offset, GLsizeiptr size, bool dsa);
  73
  74 extern void
  75 _mesa_bind_buffer_base_transform_feedback(struct gl_context *ctx,
  76                                           struct gl_transform_feedback_object *obj,
  77                                           GLuint index,
  78                                           struct gl_buffer_object *bufObj,
  79                                           bool dsa);
  80
  81 extern void GLAPIENTRY
  82 _mesa_BindBufferOffsetEXT(GLenum target, GLuint index, GLuint buffer,
  83                           GLintptr offset);
  84
  85 extern void GLAPIENTRY
  86 _mesa_TransformFeedbackVaryings(GLuint program, GLsizei count,
  87                                 const GLchar * const *varyings,
  88                                 GLenum bufferMode);
  89
  90 extern void GLAPIENTRY
  91 _mesa_GetTransformFeedbackVarying(GLuint program, GLuint index,
  92                                   GLsizei bufSize, GLsizei *length,
  93                                   GLsizei *size, GLenum *type, GLchar *name);
  94
  95
  96
  97 /*** GL_ARB_transform_feedback2 ***/
  98 extern void
  99 _mesa_init_transform_feedback_object(struct gl_transform_feedback_object *obj,
 100                                      GLuint name);
 101
 102 struct gl_transform_feedback_object *
 103 _mesa_lookup_transform_feedback_object(struct gl_context *ctx, GLuint name);
 104
 105 extern void GLAPIENTRY
 106 _mesa_GenTransformFeedbacks(GLsizei n, GLuint *names);
 107
 108 extern void GLAPIENTRY
 109 _mesa_CreateTransformFeedbacks(GLsizei n, GLuint *names);
 110
 111 extern GLboolean GLAPIENTRY
 112 _mesa_IsTransformFeedback(GLuint name);
 113
 114 void GLAPIENTRY
 115 _mesa_BindTransformFeedback_no_error(GLenum target, GLuint name);
 116
 117 extern void GLAPIENTRY
 118 _mesa_BindTransformFeedback(GLenum target, GLuint name);
 119
 120 extern void GLAPIENTRY
 121 _mesa_DeleteTransformFeedbacks(GLsizei n, const GLuint *names);
 122
 123 void GLAPIENTRY
 124 _mesa_PauseTransformFeedback_no_error(void);
 125
 126 extern void GLAPIENTRY
 127 _mesa_PauseTransformFeedback(void);
 128
 129 void GLAPIENTRY
 130 _mesa_ResumeTransformFeedback_no_error(void);
 131
 132 extern void GLAPIENTRY
 133 _mesa_ResumeTransformFeedback(void);
 134
 135 static inline bool
 136 _mesa_is_xfb_active_and_unpaused(const struct gl_context *ctx)
 137 {
 138    return ctx->TransformFeedback.CurrentObject->Active &&
 139       !ctx->TransformFeedback.CurrentObject->Paused;
 140 }
 141
 142 extern bool
 143 _mesa_transform_feedback_is_using_program(struct gl_context *ctx,
 144                                           struct gl_shader_program *shProg);
 145
 146 static inline void
 147 _mesa_set_transform_feedback_binding(struct gl_context *ctx,
 148                                      struct gl_transform_feedback_object *tfObj, GLuint index,
 149                                      struct gl_buffer_object *bufObj,
 150                                      GLintptr offset, GLsizeiptr size)
 151 {
 152    _mesa_reference_buffer_object(ctx, &tfObj->Buffers[index], bufObj);
 153
 154    tfObj->BufferNames[index]   = bufObj->Name;
 155    tfObj->Offset[index]        = offset;
 156    tfObj->RequestedSize[index] = size;
 157
 158    if (bufObj != ctx->Shared->NullBufferObj)
 159       bufObj->UsageHistory |= USAGE_TRANSFORM_FEEDBACK_BUFFER;
 160 }
 161
 162 static inline void
 163 _mesa_bind_buffer_range_xfb(struct gl_context *ctx,
 164                             struct gl_transform_feedback_object *obj,
 165                             GLuint index, struct gl_buffer_object *bufObj,
 166                             GLintptr offset, GLsizeiptr size)
 167 {
 168    /* Note: no need to FLUSH_VERTICES or flag NewTransformFeedback, because
 169     * transform feedback buffers can't be changed while transform feedback is
 170     * active.
 171     */
 172
 173    /* The general binding point */
 174    _mesa_reference_buffer_object(ctx,
 175                                  &ctx->TransformFeedback.CurrentBuffer,
 176                                  bufObj);
 177
 178    /* The per-attribute binding point */
 179    _mesa_set_transform_feedback_binding(ctx, obj, index, bufObj, offset, size);
 180 }
 181
 182 /*** GL_ARB_direct_state_access ***/
 183
 184 extern void GLAPIENTRY
 185 _mesa_TransformFeedbackBufferBase(GLuint xfb, GLuint index, GLuint buffer);
 186
 187 extern void GLAPIENTRY
 188 _mesa_TransformFeedbackBufferRange(GLuint xfb, GLuint index, GLuint buffer,
 189                                    GLintptr offset, GLsizeiptr size);
 190
 191 extern void GLAPIENTRY
 192 _mesa_GetTransformFeedbackiv(GLuint xfb, GLenum pname, GLint *param);
 193
 194 extern void GLAPIENTRY
 195 _mesa_GetTransformFeedbacki_v(GLuint xfb, GLenum pname, GLuint index,
 196                               GLint *param);
 197
 198 extern void GLAPIENTRY
 199 _mesa_GetTransformFeedbacki64_v(GLuint xfb, GLenum pname, GLuint index,
 200                                 GLint64 *param);
 201
 202 #endif /* TRANSFORM_FEEDBACK_H */